2 open-source alternatives to Zendesk, curated: Freescout, Zammad. Each is open-source; compare license and links below.
| Tool | What it is | License | Open source |
|---|---|---|---|
| Freescout | FreeScout is a free, self-hosted OSS open source alternative to Zendesk and Help Scout — a help desk and shared inbox with unlimited agents (AGPL-3.0). | AGPL-3.0 | yes |
| Zammad | Zammad is a web-based open source helpdesk — email, chat, phone and social ticketing in one, a self-hosted OSS alternative to Zendesk (AGPL-3.0). | AGPL-3.0 | yes |